Crafted from food grade silicone, these gaskets is, and sturdy, ensuring stable use without compromising or health Suitable for hiking, commuting, or family gatherings, these gaskets maintain a tight seal, leaks and spills in any situation, ensuring your drink stay freshness Easy to installing and replace, these gaskets contribute to environmental sustainabilities by reducing singles use waste, making it a user friendly option for consumers Ideal for outdoors enthusiasts, busy professional, and families, these seal rings meet those who need spill proof hydrations solution Ensures a leak proof with our Cup Lid Seal Gaskets Replacement Parts, specifically produced for 40oz tumblers, providing a great fit and great sealing to keep your beverages secure